Is caffeine good for you?

A:

Quick Answer

A moderate amount of caffeine may help a person feel more alert and awake, but excessive consumption does present health risks. For adults in good health, up to 400 milligrams of caffeine per day is generally acceptable, according to Mayo Clinic.

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Caffeine consumption in excess of 400 milligrams per day can lead to several undesirable side effects, warns Mayo Clinic, including a fast heartbeat, irritability, nervousness, restlessness and an upset stomach. People prone to high blood pressure or anxiety, especially those taking medications, may experience side effects even at lower levels of consumption. Caffeine is not recommended for kids, and adolescents should limit consumption to a maximum of 100 milligrams a day.